Note 55 — EXCURSION III.
Reading edition
The quantity of Copper procured in this way at Botallack, says Mr. Carne, is about a ton in a year. This chemical process is now practised in most of the mines in which the "Tin-stone" is mixed with Copper ore, as in Dolcoath, Cook's Kitchen, Chacewater, and in some parts of St. Agnes.